173 lines
7.1 KiB
Python
173 lines
7.1 KiB
Python
'''
|
|
Onionr - P2P Microblogging Platform & Social network
|
|
|
|
This file handles Onionr's cryptography.
|
|
'''
|
|
'''
|
|
This program is free software: you can redistribute it and/or modify
|
|
it under the terms of the GNU General Public License as published by
|
|
the Free Software Foundation, either version 3 of the License, or
|
|
(at your option) any later version.
|
|
|
|
This program is distributed in the hope that it will be useful,
|
|
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
GNU General Public License for more details.
|
|
|
|
You should have received a copy of the GNU General Public License
|
|
along with this program. If not, see <https://www.gnu.org/licenses/>.
|
|
'''
|
|
import nacl.signing, nacl.encoding, nacl.public, nacl.secret, os, binascii, base64
|
|
|
|
class OnionrCrypto:
|
|
def __init__(self, coreInstance):
|
|
self._core = coreInstance
|
|
self._keyFile = 'data/keys.txt'
|
|
self.pubKey = None
|
|
self.privKey = None
|
|
|
|
# Load our own pub/priv Ed25519 keys, gen & save them if they don't exist
|
|
if os.path.exists(self._keyFile):
|
|
with open('data/keys.txt', 'r') as keys:
|
|
keys = keys.read().split(',')
|
|
self.pubKey = keys[0]
|
|
self.privKey = keys[1]
|
|
else:
|
|
keys = self.generatePubKey()
|
|
self.pubKey = keys[0]
|
|
self.privKey = keys[1]
|
|
with open(self._keyFile, 'w') as keyfile:
|
|
keyfile.write(self.pubKey + ',' + self.privKey)
|
|
return
|
|
|
|
def edVerify(self, data, key):
|
|
'''Verify signed data (combined in nacl) to an ed25519 key'''
|
|
key = nacl.signing.VerifyKey(key=key, encoder=nacl.encoding.Base32Encoder)
|
|
retData = ''
|
|
if encodeResult:
|
|
retData = key.verify(data.encode(), encoder=nacl.encoding.Base64Encoder) # .encode() is not the same as nacl.encoding
|
|
else:
|
|
retData = key.verify(data.encode())
|
|
return retData
|
|
|
|
def edSign(self, data, key, encodeResult=False):
|
|
'''Ed25519 sign data'''
|
|
key = nacl.signing.SigningKey(seed=key, encoder=nacl.encoding.Base32Encoder)
|
|
retData = ''
|
|
if encodeResult:
|
|
retData = key.sign(data.encode(), encoder=nacl.encoding.Base64Encoder) # .encode() is not the same as nacl.encoding
|
|
else:
|
|
retData = key.sign(data.encode())
|
|
return retData
|
|
|
|
def pubKeyEncrypt(self, data, pubkey, anonymous=False, encodedData=False):
|
|
'''Encrypt to a public key (Curve25519, taken from base32 Ed25519 pubkey)'''
|
|
retVal = ''
|
|
|
|
if encodedData:
|
|
encoding = nacl.encoding.Base64Encoder
|
|
else:
|
|
encoding = nacl.encoding.RawEncoder
|
|
|
|
if self.privKey != None and not anonymous:
|
|
ownKey = nacl.signing.SigningKey(seed=self.privKey, encoder=nacl.encoding.Base32Encoder())
|
|
key = nacl.signing.VerifyKey(key=pubkey, encoder=nacl.encoding.Base32Encoder).to_curve25519_public_key()
|
|
ourBox = nacl.public.Box(ownKey, key)
|
|
retVal = ourBox.encrypt(data.encode(), encoder=encoding)
|
|
elif anonymous:
|
|
key = nacl.signing.VerifyKey(key=pubkey, encoder=nacl.encoding.Base32Encoder).to_curve25519_public_key()
|
|
anonBox = nacl.public.SealedBox(key)
|
|
retVal = anonBox.encrypt(data.encode(), encoder=encoding)
|
|
return retVal
|
|
|
|
def pubKeyDecrypt(self, data, pubkey='', anonymous=False, encodedData=False):
|
|
'''pubkey decrypt (Curve25519, taken from Ed25519 pubkey)'''
|
|
retVal = False
|
|
if encodedData:
|
|
encoding = nacl.encoding.Base64Encoder
|
|
else:
|
|
encoding = nacl.encoding.RawEncoder
|
|
ownKey = nacl.signing.SigningKey(seed=self.privKey, encoder=nacl.encoding.Base32Encoder()).to_curve25519_private_key()
|
|
if self.privKey != None and not anonymous:
|
|
ourBox = nacl.public.Box(ownKey, pubkey)
|
|
decrypted = ourBox.decrypt(data, encoder=encoding)
|
|
elif anonymous:
|
|
anonBox = nacl.public.SealedBox(ownKey)
|
|
decrypted = anonBox.decrypt(data, encoder=encoding)
|
|
return decrypted
|
|
|
|
def symmetricPeerEncrypt(self, data, peer):
|
|
'''Salsa20 encrypt data to peer (with mac)
|
|
this function does not accept a key, it is a wrapper for encryption with a peer
|
|
'''
|
|
key = self._core.getPeerInfo(4)
|
|
if type(key) != bytes:
|
|
key = self._core.getPeerInfo(2)
|
|
encrypted = self.symmetricEncrypt(data, key, encodedKey=True)
|
|
return encrypted
|
|
|
|
def symmetricPeerDecrypt(self, data, peer):
|
|
'''Salsa20 decrypt data from peer (with mac)
|
|
this function does not accept a key, it is a wrapper for encryption with a peer
|
|
'''
|
|
key = self._core.getPeerInfo(4)
|
|
if type(key) != bytes:
|
|
key = self._core.getPeerInfo(2)
|
|
decrypted = self.symmetricDecrypt(data, key, encodedKey=True)
|
|
return decrypted
|
|
|
|
return
|
|
|
|
def symmetricEncrypt(self, data, key, encodedKey=False, returnEncoded=True):
|
|
'''Encrypt data to a 32-byte key (Salsa20-Poly1305 MAC)'''
|
|
if encodedKey:
|
|
encoding = nacl.encoding.Base64Encoder
|
|
else:
|
|
encoding = nacl.encoding.RawEncoder
|
|
|
|
# Make sure data is bytes
|
|
if type(data) != bytes:
|
|
data = data.encode()
|
|
|
|
box = nacl.secret.SecretBox(key, encoder=encoding)
|
|
|
|
if returnEncoded:
|
|
encoding = nacl.encoding.Base64Encoder
|
|
else:
|
|
encoding = nacl.encoding.RawEncoder
|
|
|
|
encrypted = box.encrypt(data, encoder=encoding)
|
|
return encrypted
|
|
|
|
def symmetricDecrypt(self, data, key, encodedKey=False, encodedMessage=False, returnEncoded=False):
|
|
'''Decrypt data to a 32-byte key (Salsa20-Poly1305 MAC)'''
|
|
if encodedKey:
|
|
encoding = nacl.encoding.Base64Encoder
|
|
else:
|
|
encoding = nacl.encoding.RawEncoder
|
|
box = nacl.secret.SecretBox(key, encoder=encoding)
|
|
|
|
if encodedMessage:
|
|
encoding = nacl.encoding.Base64Encoder
|
|
else:
|
|
encoding = nacl.encoding.RawEncoder
|
|
decrypted = box.decrypt(data, encoder=encoding)
|
|
if returnEncoded:
|
|
decrypted = base64.b64encode(decrypted)
|
|
return decrypted
|
|
|
|
def generateSymmetricPeer(self, peer):
|
|
'''Generate symmetric key for a peer and save it to the peer database'''
|
|
key = self.generateSymmetric()
|
|
self._core.setPeerInfo(peer, 'forwardKey', key)
|
|
return
|
|
|
|
def generateSymmetric(self):
|
|
'''Generate a symmetric key (bytes) and return it'''
|
|
return binascii.hexlify(nacl.utils.random(nacl.secret.SecretBox.KEY_SIZE))
|
|
|
|
def generatePubKey(self):
|
|
'''Generate a Ed25519 public key pair, return tuple of base32encoded pubkey, privkey'''
|
|
private_key = nacl.signing.SigningKey.generate()
|
|
public_key = private_key.verify_key.encode(encoder=nacl.encoding.Base32Encoder())
|
|
return (public_key.decode(), private_key.encode(encoder=nacl.encoding.Base32Encoder()).decode()) |